PR #23512 opened by Valerii Zapodovnikov (Balling) URL: https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/23512 Patch URL: https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/23512.patch
Fixes #11578. Found-by: Paul B Mahol Signed-off-by: Valerii Zapodovnikov <[email protected]> # Summary of changes Briefly describe what this PR does and why. <!-- If this PR requires new FATE test samples, attach them to the PR and list their target paths below (relative to the fate-suite root). Attached filenames must match the sample's filename: ```fate-samples # e.g. vorbis/new-sample.ogg ``` --> >From c15e6aa4c013be3027875a1f5300690b552643fd Mon Sep 17 00:00:00 2001 From: Valerii Zapodovnikov <[email protected]> Date: Wed, 17 Jun 2026 06:20:34 +0300 Subject: [PATCH] avcodec/ac3dec: fix corrupted frame in some Atmos samples Fixes #11578. Found-by: Paul B Mahol Signed-off-by: Valerii Zapodovnikov <[email protected]> --- libavcodec/ac3dec.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/libavcodec/ac3dec.c b/libavcodec/ac3dec.c index 6f7306ea59..4c718fc1b3 100644 --- a/libavcodec/ac3dec.c +++ b/libavcodec/ac3dec.c @@ -85,10 +85,12 @@ static void ac3_downmix(AVCodecContext *avctx) !av_channel_layout_compare(&s->downmix_layout, &mono)) { av_channel_layout_uninit(&avctx->ch_layout); avctx->ch_layout = (AVChannelLayout)AV_CHANNEL_LAYOUT_MONO; + s->downmixed = 1; } else if (avctx->ch_layout.nb_channels > 2 && !av_channel_layout_compare(&s->downmix_layout, &stereo)) { av_channel_layout_uninit(&avctx->ch_layout); avctx->ch_layout = (AVChannelLayout)AV_CHANNEL_LAYOUT_STEREO; + s->downmixed = 1; } } @@ -130,7 +132,6 @@ static av_cold int ac3_decode_init(AVCodecContext *avctx) avctx->sample_fmt = AV_SAMPLE_FMT_FLTP; ac3_downmix(avctx); - s->downmixed = 1; for (i = 0; i < AC3_MAX_CHANNELS; i++) { s->xcfptr[i] = s->transform_coeffs[i]; -- 2.52.0 _______________________________________________ ffmpeg-devel mailing list -- [email protected] To unsubscribe send an email to [email protected]
